Republican senators with presidential ambitions face a huge decision on whether to back — or buck — GOP leaders on the budget.

This week’s budget vote will be dramatic because Senate GOP leaders have to minimize defections to pass their blueprint, and White House hopefuls know their votes will reverberate on the 2016 campaign trail.

Not surprisingly, most of the 2016 crowd is keeping quiet about their strategy for Thursday’s budget votes.

Texas Sen. Ted Cruz (R), Kentucky Sen. Rand Paul (R) and Florida Sen. Marco Rubio (R) have been mum in private meetings, giving little hint to their rivals on whether they will vote for the budget’s final passage. Sen. Lindsey Graham (R-S.C.), the fourth GOP senator expected to pursue a presidential bid, says he will vote “yes.”